Effective magnetic moment of $Sc^{3+}$ ion is

Find the value of spin-only magnetic moment for chromium cation in $+2$ state. (in $BM$)

Although Zirconium belongs to the $4d$ transition series and Hafnium to the $5d$ transition series,they show similar physical and chemical properties because . . . . . . .

The chloride of which of the following elements will be coloured?

What is the correct order of spin only magnetic moment (in $BM$) of $Mn^{2+}, Cr^{2+}$ and $V^{2+}$?

The transition metal which shows oxidation states from $+2$ to $+7$ belongs to group: